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package com.taobao.android.builder.tasks.app;

import com.alibaba.fastjson.JSON;
import com.android.build.gradle.internal.api.AppVariantContext;
import com.android.build.gradle.internal.api.AppVariantOutputContext;
import com.android.build.gradle.internal.scope.ConventionMappingHelper;
import com.android.build.gradle.internal.tasks.DefaultAndroidTask;
import com.android.build.gradle.internal.variant.BaseVariantOutputData;
import com.taobao.android.builder.AtlasBuildContext;
import com.taobao.android.builder.tasks.manager.MtlBaseTaskAction;
import com.taobao.android.builder.tools.bundleinfo.ApkFileListUtils;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.gradle.api.tasks.InputFile;
import org.gradle.api.tasks.TaskAction;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.Callable;
import java.util.jar.JarOutputStream;
import java.util.zip.ZipEntry;

/**
 * AP文件打包的task
 * Created by shenghua.nish on 2015-10-20 下午7:01.
 */
public class ApBuildTask extends DefaultAndroidTask {

    private File apkFile;

    protected AppVariantContext appVariantContext;

    protected BaseVariantOutputData baseVariantOutputData;

    private AppVariantOutputContext.AppBuildInfo appBuildInfo;

    @InputFile
    public File getApkFile() {
        return apkFile;
    }

    public void setApkFile(File apkFile) {
        this.apkFile = apkFile;
    }

    @TaskAction
    public void taskAction() throws IOException {
        // 生成build.ap

        createAP(getApkFile(), baseVariantOutputData, appVariantContext);
    }

    private File createAP(File apkFile,
                          BaseVariantOutputData variantOutputData,
                          AppVariantContext appVariantContext) throws IOException {

        File jarshrinkLog = new File(variantOutputData.getOutputFile()
                                             .getParentFile()
                                             .getParentFile(), "jar-shrink.log");

        File proguardOut = new File(String.valueOf(variantOutputData.getScope()
                                                           .getGlobalScope()
                                                           .getBuildDir()) +
                                            "/outputs/mapping/" +
                                            variantOutputData.getScope()
                                                    .getVariantScope()
                                                    .getVariantConfiguration()
                                                    .getDirName());

        // 生成build.ap
        String path = apkFile.getAbsolutePath();
        int index = path.lastIndexOf(".apk");
        File APFile = new File(path.substring(0, index) + ".ap");

        FileOutputStream fileOutputStream = new FileOutputStream(APFile);
        JarOutputStream jos = new JarOutputStream(new BufferedOutputStream(fileOutputStream));

        addFile(jos,
                variantOutputData.manifestProcessorTask.getManifestOutputFile(),
                "AndroidManifest.xml");
        addFile(jos, apkFile, "android.apk");
        addFile(jos,
                new File(variantOutputData.processResourcesTask.getTextSymbolOutputDir(), "R.txt"),
                "R.txt");

        addFile(jos, appBuildInfo.getPackageIdFile());
        addFile(jos, appBuildInfo.getDependenciesFile());
        addFile(jos, appBuildInfo.getBuildInfoFile());
        addFile(jos, appBuildInfo.getVersionPropertiesFile());
        //addFile(jos, appBuildInfo.getBundleInfoFile());

        for (File file : appBuildInfo.getOtherFiles()) {
            addFile(jos, file);
        }

        for (String filePath : appBuildInfo.getOtherFilesMap().keySet()) {
            addFile(jos, filePath, appBuildInfo.getOtherFilesMap().get(filePath));
        }

        addFile(jos, jarshrinkLog, jarshrinkLog.getName());

        addFile(jos,
                getApkFiles(APFile.getParentFile().getParentFile(), appVariantContext),
                "apk-files.txt");

        // 如果存在着proguard文件，加入结果信息
        if (null != proguardOut &&
                proguardOut.exists() &&
                (new File(proguardOut, "mapping.txt").exists() ||
                        new File(proguardOut, "full-mapping.txt").exists())) {
            File usageFile = new File(proguardOut, "usage.txt");
            File mappingFile = new File(proguardOut, "mapping.txt");
            addFile(jos, usageFile, "usage.txt");
            addFile(jos, mappingFile, "mapping.txt");
            addFile(jos, new File(proguardOut, "full-mapping.txt"), "full-mapping.txt");
            addFile(jos, new File(proguardOut, "mapping.data"), "mapping.data");
        } else if (null != appVariantContext.apContext.getApExploredFolder() &&
                appVariantContext.apContext.getApExploredFolder().exists()) {
            File lastApDir = appVariantContext.apContext.getApExploredFolder();
            File usageFile = new File(lastApDir, "usage.txt");
            File mappingFile = new File(lastApDir, "mapping.txt");
            addFile(jos, usageFile, "usage.txt");
            addFile(jos, mappingFile, "mapping.txt");
            addFile(jos, new File(lastApDir, "full-mapping.txt"), "full-mapping.txt");
            addFile(jos, new File(lastApDir, "mapping.data"), "mapping.data");
        }

        IOUtils.closeQuietly(jos);
        if (null != fileOutputStream) {
            IOUtils.closeQuietly(fileOutputStream);
        }

        return APFile;
    }

    private static File getApkFiles(File outputDir,
                                    AppVariantContext appVariantContext) throws IOException {

        ApkFileListUtils.recordApkFileInfos(appVariantContext);

        File apkFiles = new File(outputDir, "apk-files.txt");
        FileUtils.writeStringToFile(apkFiles,
                                    JSON.toJSONString(AtlasBuildContext.finalApkFileList));
        return apkFiles;
    }

    private void addFile(JarOutputStream jos, File file) {
        String entryName = file.getName();
        addFile(jos, entryName, file);
    }

    private void addFile(JarOutputStream jos, String path, File file) {
        if (null == file || !file.exists()) {
            return;
        }
        addFile(jos, file, path);
    }

    /**
     * jar文件里增加文件
     *
     * @param jos
     * @param file
     */
    private void addFile(JarOutputStream jos, File file, String entryName) {
        if (null == file || !file.exists()) {
            return;
        }
        byte[] buf = new byte[8064];
        InputStream in = null;
        if (null == file || !file.exists()) {
            return;
        }
        try {
            in = new FileInputStream(file);
            ZipEntry fileEntry = new ZipEntry(entryName);
            jos.putNextEntry(fileEntry);
            // Transfer bytes from the file to the ZIP file
            int len;
            while ((len = in.read(buf)) > 0) {
                jos.write(buf, 0, len);
            }
            // Complete the entry
            jos.closeEntry();
            in.close();
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    /**
     * 配置Ap文件
     */
    public static class ConfigAction extends MtlBaseTaskAction<ApBuildTask> {

        private AppVariantContext appVariantContext;

        public ConfigAction(AppVariantContext appVariantContext,
                            BaseVariantOutputData baseVariantOutputData) {
            super(appVariantContext, baseVariantOutputData);
            this.appVariantContext = appVariantContext;
        }

        @Override
        public String getName() {
            return scope.getTaskName("create", "Ap");
        }

        @Override
        public Class<ApBuildTask> getType() {
            return ApBuildTask.class;
        }

        @Override
        public void execute(ApBuildTask apBuildTask) {

            super.execute(apBuildTask);

            boolean isCreateAP = appVariantContext.getAtlasExtension()
                    .getTBuildConfig()
                    .getCreateAP();

            if (!isCreateAP) {
                apBuildTask.setEnabled(false);
                return;
            }

            ConventionMappingHelper.map(apBuildTask, "apkFile", new Callable<File>() {

                @Override
                public File call() {
                    return getAppVariantOutputContext().getApkOutputFile(true);
                }
            });

            apBuildTask.appVariantContext = appVariantContext;
            apBuildTask.baseVariantOutputData = scope.getVariantOutputData();
            apBuildTask.appBuildInfo = getAppVariantOutputContext().appBuildInfo;
        }
    }
}
